Commonly available mobile devices are mostly static, flat surfaces, which strongly limit user input and output possibilities to 2D planar interactions, with no sense of tactile feedback or realism. Much recent work, therefore, endeavours to depart from the limited interactions of flat mobile devices by providing shape changing, deformable actuating inputs and outputs, beckoning a new era of interaction possibilities. This workshop invites innovators, product designers and developers from industrial and academic fields including healthcare, gaming and the arts to explore the design space and applications of shape changing mobile devices. Through rapid physical prototyping, we will explore the practical efficacy of using shape changing mobile devices in personal and collaborative environments, and identify key areas of future mobile device design.